is nac a precursor to glutathione Antioxidant & Detox Support All About NAC (N-acetylcysteine): What

Glutamine, glycine, N-acetylcysteine, selenium, whey protein isolates with bonded cysteine, GSH and pro-GSH supplementation improves GSH deficiency, oxidative stress, mitochondrial dysfunction, inflammation, insulin resistance, endothelial dysfunction, genotoxicity, muscle strength, cognition and surfactant regeneration (301307)

[DOI] [PMC free article] [PubMed] [Google Scholar] 42.Benrahmoune M., Therond P., Abedinzadeh Z

Irradiated fibroblasts treated with GHK showed growth dynamics similar to non-irradiated control cells

NAC has low bioavailability as an oral supplement, meaning your body does not absorb it well